Halogen substituted phthalimide flame retardants

Abstract

Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phthalimides are useful in increasing the flame retardancy of thermoplastic and thermosetting resins, and are also effective as processing aids in improving the flowability and moldability of thermoplastic resins during melt processing.

We claim: 
     
       1. Halogen-substituted phthalimides of the formula: ##STR30## wherein (a) R is selected from ##STR31##  wherein R 1  is alkyl of 1-8 carbons, R 2  and R 3  are H or CH 3  with the proviso that R 2  and R 3  are not the same, and R 4  is alkyl of 1-12 carbons in which some of the carbons may be replaced by oxygen; ##STR32##  where B is a trivalent alkyl group of 1-6 carbons, wherein B does not comprise a central carbon atom bonded to four other carbons, R 5 , R 6 , R 7  and R 8  are H or CH 3  with the proviso that in the pairs R 2  and R 3 , R 5  and R 6 , and R 7  and R 8 , both members are not the same; ##STR33##  where R 9  is alkyl of 1 to 10 carbons, aryl, or --(CH 2 ) f  --, R 10  and R 11  may independently be H or CH 3  with the proviso that R 10  and R 11  are not the same, b and c are independently 0 to 100, and d, e and f are independently 0 to 6; ##STR34##  where R 12 , R 13  and R 14  are ##STR35##  and g=1 to 1000 with the proviso that for each of R 12 , R 13  and R 14 , g may or may not have the same value; ##STR36##  where h=1 to 6; ##STR37##  where j=1 to 500 and ##STR38##  where k=0 to 30; (b) A is Cl or Br; (c) i is 1 to 4;   (d) q is an integer of 1 to 6;   (e) L=1 to 2;   (f) m and n independently vary from 0 to 50 with the proviso that both cannot be zero; and   (g) v, w, x, y, z and a independently vary from 0 to 25 with the proviso that for each of the pairs, v and w, x and y, and z and a, both members cannot be zero.   
     
     
       2. Halogen-substituted phthalimides according to claim 1 wherein A is Br, i is 4, q is 1 to 6, and R is selected from ##STR39## 
     
     
       3. Halogen-substituted phthalimides according to claim 2 wherein q is 1 to 3, i is 4, and R 1  and R 4  are ##STR40##